Daikin VRV III REMQ72PBYD Engineering Data page 63

Installation
Beforehand, check the remaining refrigerant that is needed to
charge based on the "additional charging amount" in step 2 and
the charged amount in step 3.
• The refrigerant will be charged about 66 lb in one hour at outdoor
temp. 86°F DB (about 26 lb at outdoor temp. 32°F DB).
• During Automatic refrigerant charging operation, you can stop the
operation forcedly by pushing MODE button (BS1).
(Refer to figure 31)
1. Measuring device
2. R410A tank (with siphon)
3. Charge hose
4. Gas pipe shutoff valve
5. Liquid pipe shutoff valve
6. Refrigerant charge port
7. Valve A
8. Valve B
9. Valve C
10. Outdoor unit A
11. Outdoor unit B
12. Outdoor unit C
13. Indoor unit
14. Field pipings
15. Refrigerant flow when charging
16. Shutoff valve
17. Service port
18. The refrigerant will be charged about 66 lb in one hour at
outdoor temp. 86°FDB (26 lb at 32°FDB). (According to
outdoor temp. or the refrigerant amount in the tank, the
charging rate may speed up). If you need to speed up in
case of multi system, connect the refrigerant tanks to each
outdoor unit.
[Automatic refrigerant charging operation procedure]
NOTE
• The marks of LED mean as follows.
h i j
: OFF : ON
(1) Open the liquid pipe and gas pipe shutoff valves. (The valve A~C
must be closed. See figure 31.)
(2)  Close the electrical components box (1) lid and all front panel
except on the electrical components box (1) side. (*1) And turn
the power to the outdoor unit and all connected indoor units. (*2)
• After H2P stop blinking (about 12 minutes after turning on the
power), check H2P is OFF.
If H2P is ON, check the malfunction code in the remote controller
of indoor unit and correct the malfunction in accordance with
[Remote controller display malfunction code] in chapter 11-2-2.
(3) Check the LED. And push the MODE button (BS1) once if the LED
displays is not as below.
H1P H2P H3P H4P H5P H6P H7P
h h i h
(4) Push the TEST button (BS4) once. (The LED displays will change
as below.)
H1P H2P H3P H4P H5P H6P H7P
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(5) Hold the TEST button (BS4) down for 5 seconds or more.
(The LED displays will change as below and fan of outdoor unit will
start rotation.)
H1P H2P H3P H4P H5P H6P H7P
h j h h
(6) When the compressor start working and the LED displays change
any state in below (*3), go to "In case of cooling mode" or "In case
of heating mode" in accordance with the LED displays.
H1P H2P H3P H4P H5P H6P H7P
j j j h
j j h h
62

: Blinking : OFF, ON or Blinking
h h h
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 
h
Go to "In case of
i h i
cooling mode"
Go to "In case of
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heating mode"
In case of cooling mode
(7) Push the TEST button (BS4) once within 5 minutes after
procedure (5) (*4) and close the all front panels (*5).
After that, open the valve A immediately (See figure 31) (*6) and
watch the remote controller display of indoor unit.
(8) If the remote controller display shows "PE" code (*7), ready to close the
valve A.
And go to procedure (9).
If the remote controller display shows other code, close the valve A
immediately and refer to [Remote controller cooling mode malfunction
code]
Beware the fan running when open the front panel.
The fan may continue rotation after the system stop the operation.
(9) When the compressor stop working (the fan may continue
rotation.), close the valve A immediately (*8).
And check the LED displays are as below and the remote
controller display shows "P9" code.
H1P H2P H3P H4P H5P H6P H7P
i j j i
After checking, push the MODE button (BS1) once and the
charging is complete.
In case of heating mode
(7) Push the TEST button (BS4) once within 5 minutes after
procedure (5) (*4) and close the all front panels.
After that, open the valve A immediately (See figure 31) (*6) and
check the charged amount by measuring device.
During operation, if the remote controller display shows "P2" or
"P8" code, close the valve A immediately and refer to [Remote
controller heating mode malfunction code].
Beware the fan running when open the front panel.
The fan may continue rotation after the system stop the operation.
(8) When the required amount of refrigerant is charged, close the
valve A (See figure 30) (*8) and push the RETURN button (BS3)
once. And then go to procedure (9).
(9) Push the MODE button (BS1) once, and the charging is complete.
Notes (*1)~(*8)
(*1) Lead the refrigerant charge hose etc from the pipe intake.
All front panels must be closed at the procedure (7).
(*2)  If you perform the refrigerant charging operation within the
refrigerant system that have the power off unit, the operation
cannot finish properly.
Check the number of outdoor and indoor units that is powered.
For checking, see [How to check how many units are connected]
in chapter 11-1.
• To energize the crankcase heater, make sure to turn on for
6 hours before starting operation.
(*3) It takes about 2~10 minutes for getting stability of refrigerant
state.
If the additional refrigerant is little and operation is started before
getting stability, the system can not judge the charging amount
precisely and it cause over charge.
(*4) If the TEST button (BS4) is not pushed within 5 minutes, "P2"
code will displayed in the remote controller. In this case, refer
[Remote controller cooling (or heating) mode malfunction code].
(*5) If the front panel is opened during the operation, the system
cannot operate properly.
(*6) If you leave the system without connecting the refrigerant tank or
opening the valve A for 30 minutes or more, the system stop
operation and "P2" code are displayed in remote controller.
In this case, refer [Remote controller cooling (or heating) mode
malfunction code].
(*7) Depending on the situation of operation such as the charging
amount is little, the "PE" code may not be displayed and the "P9"
code may be displayed.
(*8) Always close the valve A and take the tank off.
The refrigerant charge port of this unit have electric expansion
valve and the valve are closed when charging is finished.
However, the valve will opened when other operation (Check
operation, normal operation, etc.). If you leave the tank
connected, the refrigerant will charged and it cause over charge.
EDUS391004-N
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3P215731-10R
Installation of Outdoor Units